Though there are no official words as yet, TV reports said that four fire tenders have been pressed into service. The TV visuals showed fire raging at the AV unit near the entrance of the refinery.

Union petroleum and natural gas minister Dharmendra Pradhan and senior officials of IOC are also present at the spot.

The refinery will be dedicated to the nation by PM Narendra Modi on February 7.

The 11th Refinery of the IOC is designed to process 100 per cent high-sulphur, including 40 per cent low-cost heavy crude oil. The refinery will produce various petroleum products like petrol, diesel, kerosene, Aviation Turbine Fuel, propylene, sulphur and petroleum coke. It is among the most advanced refineries in the world and has a unique INDMAX Unit technology, which is designed to produce 44 per cent LPG, highest from such plants.